ZIP Code 03285 — Thornton, NH
03285 is a standard (street delivery) ZIP code serving Thornton, New Hampshire, in Grafton County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 03285 at a glance
| ZIP code | 03285 |
|---|---|
| Primary city | Thornton |
| State | New Hampshire (NH) |
| County | Grafton FIPS 33009 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 2,799 |
| Coordinates | 43.924080, -71.643590 |
How ZIP+4 works in 03285
The four digits after the hyphen encode a delivery segment inside 03285. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 03285 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 03285.
| ZIP | City | Distance |
|---|---|---|
| 03293 | Woodstock, NH | 4 mi |
| 03223 | Campton, NH | 5.5 mi |
| 03262 | North Woodstock, NH | 7 mi |
| 03259 | North Sandwich, NH | 10.3 mi |
| 03251 | Lincoln, NH | 10.7 mi |
| 03215 | Waterville Valley, NH | 11.2 mi |
| 03279 | Warren, NH | 11.9 mi |
| 03227 | Center Sandwich, NH | 12 mi |
| 03245 | Holderness, NH | 12.3 mi |
| 03238 | Glencliff, NH | 12.7 mi |
| 03264 | Plymouth, NH | 13.8 mi |
| 03217 | Ashland, NH | 14.4 mi |
Questions about 03285
What is the ZIP+4 code for 03285?
03285 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 03285, you need to look up a specific street address to get them.
What city is 03285?
03285 is assigned to Thornton, New Hampshire, in Grafton County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.